RosterPrivate: add IsShutDownInProgress()

enable to check whether a shutdown process is in progress.

Change-Id: I8efdddb3caa80e9fd188f202b6e92a888a7608e5
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2042
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

headers/os/app/Roster.h

@@ -147,6 +147,7 @@ private:
 
 			status_t			_ShutDown(bool reboot, bool confirm,
 									bool synchronous);
+			status_t			_IsShutDownInProgress(bool* inProgress);
 
 			status_t			_AddApplication(const char* signature,
 									const entry_ref* ref, uint32 flags,

headers/private/app/RegistrarDefs.h

@@ -46,6 +46,7 @@ enum {
 	B_REG_GET_CLIPBOARD_MESSENGER			= 'rgcm',
 	B_REG_GET_DISK_DEVICE_MESSENGER			= 'rgdm',
 	B_REG_SHUT_DOWN							= 'rgsh',
+	B_REG_IS_SHUT_DOWN_IN_PROGRESS			= 'rgsi',
 
 	// roster requests
 	B_REG_ADD_APP							= 'rgaa',

headers/private/app/RosterPrivate.h

@@ -39,6 +39,8 @@ class BRoster::Private {
 
 		status_t ShutDown(bool reboot, bool confirm, bool synchronous)
 			{ return fRoster->_ShutDown(reboot, confirm, synchronous); }
+		status_t IsShutDownInProgress(bool* inProgress)
+			{ return fRoster->_IsShutDownInProgress(inProgress); }
 
 		// needed by BApplication
 

src/kits/app/Roster.cpp

@@ -1343,6 +1343,43 @@ BRoster::_ShutDown(bool reboot, bool confirm, bool synchronous)
 }
 
 
+/*!	Checks whether a shutdown process is in progress.
+
+	\param inProgress: Pointer to a pre-allocated bool to be filled in
+	       by this method, indicating whether or not a shutdown process
+	       is in progress.
+	\return A status code, \c B_OK on success or another error code in case
+	        something went wrong.
+*/
+status_t
+BRoster::_IsShutDownInProgress(bool* inProgress)
+{
+	status_t error = B_OK;
+
+	// compose the request message
+	BMessage request(B_REG_IS_SHUT_DOWN_IN_PROGRESS);
+
+	// send the request
+	BMessage reply;
+	if (error == B_OK)
+		error = fMessenger.SendMessage(&request, &reply);
+
+	// evaluate the reply
+	if (error == B_OK) {
+		if (reply.what == B_REG_SUCCESS) {
+			if (inProgress != NULL
+				&& reply.FindBool("in-progress", inProgress) != B_OK) {
+				error = B_ERROR;
+			}
+		} else if (reply.FindInt32("error", &error) != B_OK)
+			error = B_ERROR;
+	}
+
+	return error;
+}
+
+
+
 /*!	(Pre-)Registers an application with the registrar.
 
 	This methods is invoked either to register or to pre-register an

src/servers/registrar/Registrar.cpp

@@ -248,6 +248,13 @@ Registrar::_MessageReceived(BMessage *message)
 			_HandleShutDown(message);
 			break;
 		}
+		case B_REG_IS_SHUT_DOWN_IN_PROGRESS:
+		{
+			PRINT("B_REG_IS_SHUT_DOWN_IN_PROGRESS\n");
+
+			_HandleIsShutDownInProgress(message);
+			break;
+		}
 		case B_REG_TEAM_DEBUGGER_ALERT:
 		{
 			if (fShutdownProcess != NULL)
@@ -416,6 +423,18 @@ Registrar::_HandleShutDown(BMessage *request)
 }
 
 
+/*!	\brief Handle a is shut down in progress request message.
+	\param request The request to be handled.
+*/
+void
+Registrar::_HandleIsShutDownInProgress(BMessage *request)
+{
+	BMessage reply(B_REG_SUCCESS);
+	reply.AddBool("in-progress", fShutdownProcess != NULL);
+	request->SendReply(&reply);
+}
+
+
 //	#pragma mark -
 
 

src/servers/registrar/Registrar.h

@@ -58,6 +58,7 @@ public:
 private:
 	void _MessageReceived(BMessage *message);
 	void _HandleShutDown(BMessage *message);
+	void _HandleIsShutDownInProgress(BMessage *message);
 
 	TRoster					*fRoster;
 	ClipboardHandler		*fClipboardHandler;